Heat oven to 200C/180C fan/gas 6. Line the bottom of a roasting tin that’s large enough to fit the salmon in with baking parchment. Brush ½ tbsp oil over the skin and season all over. Place skin-side down in the tin and roast for 15-20 mins until the salmon is just cooked through.

Meanwhile, toast the coriander and cumin seeds in a dry frying pan. Tip into a blender and add all the remaining ingredients. Blitz to a smooth green sauce, adding enough water to get a drizzling consistency. Season to taste. The chermoula can be made in the morning and kept chilled in the fridge. Put the salmon on a serving platter and drizzle over a little chermoula, with the rest on the side to serve.